Automatic time-switch.



R. B. CRAIG & A. E. COX. AUTOMATIC TIME SWITCH.-

APPLlCATlON FILED JULY 2.4. ms.

1,245,572. Patented Nov. 6, 1917.

2 SHEETSSHEET I.

R. B. CRAlG & A. E. COX.

AUTOMATIC TIME SWITCH.

APPLICATION FILED JULY 24. ms.

1,245,572. Patented Nov. 6,1917.

2 SHEETS-SHEET 2.

nun-:1

monenriENsoN seals; or eateaair, ama gam. EUGENE COX, 1 or oiio'roxs,ALBERTA, e-ANADA.

1'0 allachom it may concern: Y

Be it known that we, "Retake" CRAIG, a citizen of Canada, and ALLEfi' EUGENE Cox, a citizen of the United States, and residing, respectively, atCalgary and Okotoks, both in the Province of Alberta, in the Dominion ofCanada, have jointly invented new and useful Improvements in AutomaticTime-Switches, of which the following is a specification.

Our invention relates to improvements in an automatic time switch andthe object of our invention is to enable the illumination of display oradvertising matter for a pre arranged period of time withoutsupervision.

e attain this by the mechanism illustrated in the accompanying drawings,in which Figure 1. is a plan of the device with the ordinary dial andhands removed for the sake of clearness.

Fig. 2. a section showing the trip lever resting on the dial havingreturned to the normal position after the passing of the trip pin U.

Fig. 3. a section through the gear wheel which carries the hour hand.

Fig. 4. a part plan of the gear wheel showing the ratchet wheel.

Fig. 5. a section through the large dial.

Fig. 6. a plan of the large dial and ratchet underneath.

Fig. 7. a section of the ratchet for the upper dial.

Fig. 8. a plan of the upper dial ratchet.

Fig. 9. a section of the upper dial.

Fig. 10. a plan of the upper dial.

Figs. 11, 12. are section and plan respectively of the friction collar.

Fig. 13. an elevation of the trip lever rest.

Fig. 14. the elevation of the trip lever.

Similar letters refer to similar parts throughout the several views.

A; is an ordinary clock movement with a 24 hour dial having a gear wheelwith a long cannon pin, to which said gear wheel is fastened a ratchetwheel G. H; the lower dial which carries the fixed trip pin U, isdivided into 24 parts which may be numbered, has a ratchet and springunderneath which engages on the ratchet wheel G, in such a manner as toallow only a forward movement of the dial for setting purposes.

K; isthe ratchet wheel for the up er dial 1, \Y v ed on"to 'the iron pinand acts as a friction collar for the dial H; I; is the upper dialprovided with a ratchet and spring and having slots T, in which slotsare movable trip pins M. The friction collar L, holds the dials inposition on the cannon pin, and as the dials revolve the trip pins U,and M, raise the trip lever D, release the sprocket wheel C, allowing aquarter turn of the switch which is driven by the spring P, F; is a wirespring which brings the trip lever to the dial after the passing of thetrip pin. E; is the bracket which supports the trip lever and the springF. N; is a small piece of insulation directly under the switch. 0; isthe main insulation directly under the switch. B; is the switch whichmay be of any rotary type. Q; is an insulation ring between the contactbreaker and the vertical spindle of the switch. U; is the fixed trip pinon the dial H. M; is the movable trip pin, in the dial I, which can beput out of action by pushing to the center of the dial. The number ofthese trip pins may be varied as required.

The dials h and 71 having a rotary motion on the cannon pin g and notbeing attached thereto but merely held in position by friction collarsin the shape of ratchet wheels, adjustments may be made to each dialindependently thereby giving any desired period of time between theoperation of any two cams.

Further than thisthe dials making one complete revolution everytwenty-four hours each cam will operate the trip lever only once in thatperiod and by setting the cams in position display or other matter maybe illuminated for any desired period without the necessity of personalattention, an advantage to store keepers who do not reside in closeproximity to their store.

e are aware that prior to our invention automatic time switches havebeen made using dials operating on a cannon pin. We do not thereforeclaim such a combination broadly but hat we do claim as our invention,and desire to secure by Letters Patent is 1. The combination in anautomatic time switch of a series of dials mounted on a cannon pin thedials placed one above the other, the upper dial being diametricallysmaller than the dial below, the said dials having slots cut radiallyfrom a point near the center to a point near the circumference in whichslots are trip pins the upper edges of which coact on a trip lever andoperate an electric switch all substantially as set forth.

2. The combination in an automatic time switch of a series of dialsmounted on a cannon pin, the dials placed one above the other, the upperdial being diametrically smaller than the dial below, the said dialshaving radial slots in which are movable trip pins which said trip pinsmay be rendered inoperative by moving toward the centerof the dial allsubstantially as set 15 forth.

Copies 0! this patent may be obtained for five cents each, by addressingthe fiommissioner of Patents,

Washington, D. O.

